Text enhancement in digital video
Huiping Li, Omid E. Kia, David Doermann · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1999
One difficulty with using text from digital video for indexing and retrieval is that video images are often in low resolution and poor quality, and as a result, the text can not be recognized adequately by most commercial OCR software. Text image enhancement is necessary to achieve reasonable OCR accuracy. Our enhancement consists of two main procedures, resolution enhancement based on Shannon interpolation and text separation from complex image background. Experiments show our enhancement approach improves OCR accuracy considerably. Keywords: Text enhancement, Adaptive thresholding, OCR, Shannon Interpolation 1. INTRODUCTION The increasing availability of online digital imagery and video has rekindled interest in the problems of how to index multimedia information sources automatically and how to browse and manipulate them efficiently. Although content based recognition has not progressed to the point where it is useful for indexing heterogeneous collections, text in digital videos...